Niépce's photographs were produced on a polished pewter plate covered with a petroleum derivative called Bitumen of Judea. Bitumen hardens with exposure to light. The unhardened material may then be washed away and the metal plate polished, rendering a negative image which then may be coated with ink and impressed upon paper, producing a print. Niépce then began experimenting with silver compounds based on a Johann Heinrich Schultz discovery in 1724 that a silver and chalk mixture darkens when exposed to light. The photograph on the left: "View from the Window" is earliest surviving photograph of a scene from nature, circa 1826.

In partnership, Niépce (in Chalon-sur-Saône) and Louis Daguerre (in Paris) refined the existing silver process. In 1833 Niépce died suddenly of a stroke, leaving his notes to Daguerre. While he had no scientific background, Daguerre made two pivotal contributions to the process. He discovered that exposing the silver first to iodine vapour before exposure to light, and then to mercury fumes after the photograph was taken, could form a latent image. Bathing the plate in a salt bath then fixes the image.

On January 7, 1839, Daguerre announced that he had invented a process using silver on a copper plate called the daguerreotype. "Boulevard du Temple", taken by Daguerre in late 1838 or early 1839, was the first-ever photograph of a person. It is an image of a busy street, but because exposure time was over ten minutes, the city traffic was moving too much to appear. The exception is a man in the bottom left corner, who stood still getting his boots polished long enough to show up in the picture.

This best-known image of Edgar Allan Poe was a daguerreotype taken in 1848 by W.S. Hartshorn, shortly before Poe's death. A similar process is still used today for Polaroid photos. The French government bought the patent and immediately made it public domain. The French Academy of Sciences announced the daguerreotype process on January 9 of that year. The announcement of the daguerreotype process in 1839, along with William Fox Talbot's in the same year, marks the date used as the invention of photography. Instead of Daguerre obtaining a French patent, the French government provided a pension for him. In Britain, Miles Berry, acting on Daguerre's behalf, obtained a patent for the daguerreotype process on 14 August 1839. Almost simultaneously, on 19 August 1839, the French government announced the invention as a gift "Free to the World".DAGUERREOTYPE PROCESSThe daguerreotype is a unique photographic image allowing no reproduction of the picture. Preparation of the plate prior to image exposure resulted in the formation of a layer of photo-sensitive silver halide, and exposure to a scene or image through a focusing lens formed a latent image. The latent image was made visible, or "developed", by placing the exposed plate over a slightly heated (about 75°C) cup of mercury.

The mercury vapor condensed on those places where the exposure light was most intense, in proportion with the areas of highest density in the image. This produced a picture in an amalgam, the mercury vapor attaching itself to the altered silver iodide. Removal of the mercury image by heat validates this chemistry. The developing box was constructed to allow inspection of the image through a yellow glass window while it was being developed.

The next operation was to "fix" the photographic image permanently on the plate by dipping in a solution of hyposulphite of soda – known as "fixer" or "hypo". The image produced by this method is so delicate it will not bear the slightest handling. Practically all daguerreotypes are protected from accidental damage by a glass-fronted case. It was discovered by experiment that treating the plate with heated gold chloride both tones and strengthens the image, although it remains quite delicate and requires a well-sealed case to protect against touch as well as oxidation of the fine silver deposits forming the blacks in the image. The best-preserved daguerreotypes dating from the nineteenth century are sealed in robust glass cases evacuated of air and filled with a chemically inert gas, typically nitrogen.DAGUERREOTYPE PROLIFERATION

In the early 1840s, the invention was introduced in a period of months to practitioners in the United States by Samuel Morse, inventor of the telegraph code. (Didn't I tell you all this is connected). The Daguerreotype on the left is of soon-to-be President Abraham Lincoln, and was taken in 1846 by Nicholas Shepherd.One of these original Morse Daguerreotype cameras is currently on display at the National Museum of American History, a branch of the Smithsonian, in Washington, DC.

A flourishing market in portraiture sprang up, predominantly the work of itinerant practitioners who traveled from town to town. For the first time in history, people could obtain an exact likeness of themselves or their loved ones for a modest cost, making portrait photographs extremely popular with those of modest means. Their wealthy counterparts continued to commission painted portraits by fine artists, considering the new photographic portraits inferior in much the same way their ancestors had viewed printed books as inferior to hand-scribed books centuries earlier. In some ways they were right, in other ways wrong; the vast bulk of 19th-century portrait photography effected by itinerant practitioners was of inferior artistic quality, yet the work of many portrait painters was of equally dubious artistic merit, and although photographic images were monochrome, they offered a technical likeness of the sitter no portrait painter could achieve. Finally, the first erotic photography and the first experimenters in stereo photography also utilized daguerreotypes.

DEMISEThe intricate, complex, labor-intensive daguerreotype process itself helped contribute to the rapid move to the ambrotype and tintype. The resulting reduction in economy of scale made daguerreotypes expensive and not affordable for the average person. However, it remained very popular in astronomical observatories until the invention of Charge-coupled device cameras, arrived in the late 20th century. According to Mace (1999), the rigidity of these images stems more from the seriousness of the activity than a long exposure time, which he says was actually only a few seconds (Early Photographs, p. 21). The daguerreotype's lack of a negative image from which multiple positive "prints" could be made was a limitation also shared by the tintype and ambrotype and was not a factor in the daguerreotype's demise until the introduction of the calotype. Unlike film and paper photography however, a properly sealed daguerreotype can potentially last indefinitely.

In May 2007, an anonymous buyer paid 588,613 euros ($792,000 USD) for an original 1839 camera made by Susse Frères (Susse brothers), Paris, at an auction in Vienna, Austria, making it the world's oldest and most expensive commercial photographic apparatus.

The daguerreotype's popularity was not threatened until photography was used to make imitation daguerreotypes on glass positives called ambrotypes, meaning "imperishable picture" (Newhall, 107).[6]LIVING ARTSome daguerreotypes which have maker's marks, such as those by Southworth & Hawes of Boston, or George S. Cook of Charleston, South Carolina, Gurney, Pratt and others, are considered masterpieces in the art of photography. The daguerreotype of Edgar Allan Poe (above) was featured on the PBS show Antiques Roadshow and appraised at US $30,000 to $50,000.

Daguerreotypy continues to be practiced by enthusiastic photographers to this day, although in much smaller numbers; there are thought to be fewer than 100 worldwide. Its appeal lies in the "magic mirror" effect of light reflected from the polished silver plate through the perfectly sharp silver image and in the sense of achievement derived from the dedication and hand-crafting required to make a daguerreotype.PHOTOGRAPHIC PROCESS DEVELOPMENT (pun somewhere there)

In 1832, French-Brazilian painter and inventor Hercules Florence had already created a very similar process, naming it Photographie. In 1832, with the help of a pharmacist friend, Joaquim Correa de Mello, he began to study ways of permanently fixing camera obscura images, which he named "photographie". In 1833, they settled on silver nitrate on paper, in a process very similar to that developed by Niépce and Daguerre. Unfortunately, partly because he never published the invention adequately, partly because he was an obscure inventor living in a remote and underveloped province in Brazil, Hércules Florence was never recognized internationally as one of the inventors of photography.

After reading about Daguerre's invention, Fox Talbot worked on perfecting his own process; in 1839 he got a key improvement, an effective fixer, from John Herschel, the astronomer, (image on left), who had previously showed that hyposulfite of soda (also known as hypo, or now sodium thiosulfate) would dissolve silver salts. Later that year, Herschel made the first glass negative.As an aside, we now have links between photography, telegraphy (early communications), astronomy, and chemistry -- that's part of why this website is so constructed!By 1840, Talbot had invented the calotype process. He coated paper sheets with silver chloride to create an intermediate negative image. Unlike a daguerreotype, a calotype negative could be used to reproduce positive prints, like most chemical films do today. Talbot patented this process, which greatly limited its adoption. He spent the rest of his life in lawsuits defending the patent until he gave up on photography.

Hippolyte Bayard had also developed a method of photography but delayed announcing it, and so was not recognized as its inventor. He was however, more interested in the artistic capabilities of the new science, and is recognized as one of its first practitioners.

In 1851 Frederick Scott Archer invented the collodion process and several chemists, notably Désiré van Monckhoven enhanced the process. Herbert Bowyer Berkeley experimented with his own version of collodian emulsions after Samman introduced the idea of adding dithionite to the pyrogallol developer. Berkeley discovered that with his own addition of sulfite, the sulfur dioxide given off by the chemical dithionite in the developer, that dithionite was not required in the developing process. In 1881 he published his discovery. Berkeley's formula contained pyrogallol, sulfite and citric acid. Ammonia was added just before use to make the formula alkaline was absorbed. The new formula was sold by the Platinotype Company in London as Sulpho-Pyrogallol Developer.So, by the 1860s, we have just about all the chemicals needed to make reasonable -- and sometimes remarkable, photographs.Children's author -- and photographer -- Lewis Carroll used this process.Charles Dodgson - aka Lewis Carroll

ASIA

Pre-Meiji Period (1646-1867): This was during Japan's feudal period when the country was ruled by the Tokugawa shogun. Japan was under self-imposed isolation from the rest of the world except for a small Dutch trading post in Nagasaki. In the mid-19th century, photographic technology was first introduced to Japan through this Dutch connection.

As Japan started to open up to the West during the final years of the Tokugawa (a period called Bakumatsu), foreigners started to settle in Japan and they included photographers who also taught photography to some Japanese. The first photographs of Japanese were also taken. The photo on the left of Lord Shimazu Nariakira is an early example of a Japanese photograph that must date from the 1850s as this leader died in 1858.

Meiji Period (1868-1912): The Emperor (Meiji) of Japan regained control of the country from the Tokugawa. Foreign tourists were allowed to travel to Japan. The foreign and Japanese photographers who set up studios catered mainly to foreign residents and tourists. More Japanese photographers also learned photography and set up their own photo studios across Japan. The importance of this photo-migration was that Japan started to develop it's own film industry, led by Fuji, named after Japan's most famous mountain, Fuji Corporation would later emerge as a powerhouse in photographic supply equipment.By the 1880s, it's fair to say that Film photography based on the enhanced Collodian chemical process had spread globally. Prints were given the generic name of "Silver Gelatin". Nowadays. photographs have evolved to a point ( where their prints are called "Gelatin Silver". These cost more than Silver Gelatin because of the name.

This link shows photographs of the period from Australia and these two pages chronicle the growth of 19th century photography in India.

SUMMARY

Between 1825 and 1875, the chemical development of the photographic process reached the level of sophistication and technique that is still in use today. If only we'd take the time to look at these old images, we would see with our own eyes, photographs that capture life, globally, from almost 200 years ago. The images help us understand the world's cultures as well as the social-political-economic issues that plague us today.